CN202303265U - Control circuit of LED vehicle lamp - Google Patents
Control circuit of LED vehicle lamp Download PDFInfo
- Publication number
- CN202303265U CN202303265U CN201120381824XU CN201120381824U CN202303265U CN 202303265 U CN202303265 U CN 202303265U CN 201120381824X U CN201120381824X U CN 201120381824XU CN 201120381824 U CN201120381824 U CN 201120381824U CN 202303265 U CN202303265 U CN 202303265U
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- Prior art keywords
- led
- circuit
- temperature sensing
- circuit board
- temperature
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Abstract
The utility model discloses a control circuit of an LED vehicle lamp. The control circuit comprises an LED vehicle lamp group, a driving circuit and a temperature sensing circuit, wherein the LED vehicle lamp group comprises a plurality of LEDs, a reflection unit and a heat radiating unit; each LED is provided with a heat radiating base and is connected with a circuit board; each heat radiating base penetrates through and is arranged above the circuit board; the reflection unit is connected and arranged on the LED; a plurality of grooves are formed in the reflection unit; each LED is positioned at the bottom of each groove; the heat radiating unit is provided with a base; the circuit board is fixedly connected onto the base; the base outwards extends and is provided with a plurality of fins in a formed way; the driving circuit is connected with the circuit board of the LED vehicle lamp group; and the temperature sensing circuit is connected with the driving circuit and comprises a temperature sensing element. The control circuit disclosed by the utility model has the characteristics that the structure is simple, the convenience for operation is realized, driving current magnitude of the LED can be automatically adjusted, the temperature of the LED can be kept in a stable state, the service life of the LED is prolonged and the practicability is realized.
Description
Technical field
The utility model relates to LED car light field, refers more particularly to the LED lamp lighting control circuit.
Background technology
Existing science and technology is for the technology of LED (light-emittingdiode), its brightness can be reached with general bulb matched in excellence or beauty, and also the product of existing tool illumination functions is to use the LED of high brightness to do the illuminator of this product of limit, for example LED car light; When utilizing this LED as the illuminator of car light group, the requirement condition of relevant control car light rules, for example standard criterions such as the colourity of the brightness of car light and light or colour temperature when this car light group still must reach.
Yet above-mentioned LED has the disappearance such as colourity or colour temperature change that causes its brightness and light along with the temperature change meeting; Briefly; This LED has the forward characteristic of the temperature coefficient of voltage, promptly when the car light that is provided with LED after starting and using a period of time, this LED can produce certain heat and cause the temperature of this LED body to raise; This moment, the forward voltage of this LED promptly can descend; Temperature rise simultaneously causes the LED internal quantum to reduce, and the brightness deterioration of this LED and the colourity or the colour temperature of light thereof is changed, and then make brightness and the colourity of light or the requirement condition that colour temperature does not meet relevant control car light rules of this car light.
The utility model content
The purpose of the utility model be to overcome above-mentioned weak point of the prior art and provide a kind of simple in structure, easy to operate, can regulate the LED amount of drive current automatically, can make LED this to temperature be in stable state, prolong the service life of LED, practical LED lamp lighting control circuit.
The utility model is realized through following mode:
The LED lamp lighting control circuit; It is characterized in that: comprise LED car light group 1, it includes some LED11, reflector element 12 and heat-sink unit 13, and described LED11 is provided with a cooling base 111; LED11 connects a circuit board 112, and cooling base 111 is arranged on the circuit board 112; Reflector element 12 is connected on the LED11, which is provided with some grooves 121, and LED11 is positioned at groove 121 bottoms; Heat-sink unit 13 has a pedestal 131, and circuit board 112 is fixedly connected on the pedestal 131; Pedestal 131 moulding that stretches out is provided with some fins 132;
Drive circuit 2 is connected with the circuit board 112 of LED car light group 1;
Temperature sensing circuit 3 is connected with drive circuit 2; Said temperature sensing circuit 3 includes temperature sensor 31, and its fixed connection is located on the fin 132; Temperature sensor 31 sends electric signal and gives temperature sensing circuit 3, and temperature sensing circuit 3 is handled electric signal and trigger drive circuit 2 work.
The utility model sends to temperature height signal to temperature sensing circuit 3 through the temperature height of temperature sensor 31 induction heat-sink units 13 then, and temperature sensing circuit 3 is handled electric signal and trigger drive circuit 2 work.
The utility model drive circuit 2 is connected with the circuit board 112 of LED car light group 1, and in order to the amount of drive current of this LED11 of control input, and then this LED11 of adjustment control keeps the colourity or the colour temperature of stable brightness and light.
In sum, the utility model provide a kind of simple in structure, easy to operate, can regulate the LED amount of drive current automatically, can make LED this to temperature be in stable state, prolong the service life of LED, practical LED lamp lighting control circuit.
Description of drawings
Fig. 1 the utility model structural representation.
The specific embodiment
Combine accompanying drawing at present, the utility model specific embodiment be detailed:
As shown in Figure 1, the LED lamp lighting control circuit is characterized in that: comprise LED car light group 1; It includes some LED11, reflector element 12 and heat-sink unit 13; Described LED11 is provided with a cooling base 111, and LED11 connects a circuit board 112, and cooling base 111 is arranged on the circuit board 112; Reflector element 12 is connected on the LED11, which is provided with some grooves 121, and LED11 is positioned at groove 121 bottoms; Heat-sink unit 13 has a pedestal 131, and circuit board 112 is fixedly connected on the pedestal 131; Pedestal 131 moulding that stretches out is provided with some fins 132;
Drive circuit 2 is connected with the circuit board 112 of LED car light group 1;
Temperature sensing circuit 3 is connected with drive circuit 2; Said temperature sensing circuit 3 includes temperature sensor 31, and its fixed connection is located on the fin 132; Temperature sensor 31 sends electric signal and gives temperature sensing circuit 3, and temperature sensing circuit 3 is handled electric signal and trigger drive circuit 2 work.
The utility model sends to temperature height signal to temperature sensing circuit 3 through the temperature height of temperature sensor 31 induction heat-sink units 13 then, and temperature sensing circuit 3 is handled electric signal and trigger drive circuit 2 work.
The utility model drive circuit 2 is connected with the circuit board 112 of LED car light group 1, and in order to the amount of drive current of this LED11 of control input, and then this LED11 of adjustment control keeps the colourity or the colour temperature of stable brightness and light.
The course of work: the LED11 of LED car light group 1 through drive circuit 2 with current control mode; After driving its startup and using a period of time; LED11 continues luminous and produces heat energy; And by the cooling base of LED11 111 with thermal energy conduction to heat-sink unit, heat-sink unit 13 then is fixedly connected on the temperature sensor 31 on the fin 132 with the thermal energy conduction that is absorbed to fin 132; Can sense the surface temperature of fin 132, this temperature sensor 31 promptly passes on an electric signal to give temperature sensing circuit 3 simultaneously; When the surface temperature of fin 132 was increased to temperature sensing circuit 3 default high temperature, then temperature sensing circuit 3 promptly produced an electric signal and sends drive circuit 2 to, and drive circuit 2 promptly limits the magnitude of current that inputs to LED11, and the input power of LED11 is weakened.After drive circuit 2 inputed to the magnitude of current of LED11 in restriction, the heat energy that LED11 produced also can reduce thereupon, caused the surface temperature of fin 132 to descend; When the surface temperature that senses this fin 132 when temperature sensor 31 dropped to temperature sensing circuit 3 default low temperature, then temperature sensing circuit 3 promptly produced an electric signal and sends drive circuit 2 to; Drive circuit 2 promptly increases the magnitude of current that inputs to LED11, and the input power of LED11 is increased.Tend towards stability through these fin 132 temperature of continuous sensing; Make the brightness of LED11 and the colourity or the colour temperature of light present stable state; And then LED11 was activated in the time of operation, the colourity of its brightness and light or colour temperature all meet the requirement of relevant control car light rules.
Claims (1)
1.LED lamp lighting control circuit; It is characterized in that: comprise LED car light group (1); It includes some LED (11), reflector element (12) and heat-sink unit (13); Described LED (11) is provided with a cooling base (111), and LED (11) connects a circuit board (112), and cooling base (111) is arranged on the circuit board (112); Reflector element (12) is connected on the LED (11), which is provided with some grooves (121), and LED (11) is positioned at groove (121) bottom; Heat-sink unit (13) has a pedestal (131), and circuit board (112) is fixedly connected on the pedestal (131); Pedestal (131) moulding that stretches out is provided with some fins (132);
Drive circuit (2) is connected with the circuit board (112) of LED car light group (1);
Temperature sensing circuit (3) is connected with drive circuit (2); Said temperature sensing circuit (3) includes temperature sensor (31), and its fixed connection is located on the fin (132); Temperature sensor (31) sends electric signal and gives temperature sensing circuit (3), and temperature sensing circuit (3) is handled electric signal and trigger drive circuit (2) work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120381824XU CN202303265U (en) | 2011-09-30 | 2011-09-30 | Control circuit of LED vehicle lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120381824XU CN202303265U (en) | 2011-09-30 | 2011-09-30 | Control circuit of LED vehicle lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202303265U true CN202303265U (en) | 2012-07-04 |
Family
ID=46372152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120381824XU Expired - Fee Related CN202303265U (en) | 2011-09-30 | 2011-09-30 | Control circuit of LED vehicle lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202303265U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103574544A (en) * | 2013-11-25 | 2014-02-12 | 奇瑞汽车股份有限公司 | LED automobile lamp driving system and control method thereof |
-
2011
- 2011-09-30 CN CN201120381824XU patent/CN202303265U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103574544A (en) * | 2013-11-25 | 2014-02-12 | 奇瑞汽车股份有限公司 | LED automobile lamp driving system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20140930 |
|
| EXPY | Termination of patent right or utility model |